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JEE Main20238 Apr 2023Morning ShiftChemistryChemical Bonding and Molecular StructureActual

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R . Assertion A : Butan– 1 –ol has higher boiling point than ethoxyethane. Reason R : Extensive hydrogen bonding leads to stronger association of molecules. In the light of the above statements, choose the correct answer from the options given below :

Options

  1. AA is true but R is false
  2. BBoth A and R are true and R is the correct explanation of A
  3. CBoth A and R are true but R is not the correct explanation of A
  4. DA is false but R is true

Correct answer

B. Both A and R are true and R is the correct explanation of A

Step-by-step solution

Butan- 1 -ol can undergo hydrogen bonding due to the presence of an - OH group, ethoxyethane (also known as diethyl ether) can also participate in hydrogen bonding. Even though there are no hydrogen atoms directly bonded to a highly electronegative atom (like   F ,   O ,   or   N ) in ethoxyethane, the molecule still has polar C - O bonds that can lead to dipole-dipole interactions with other polar molecules. Owing to intermolecular hydrogen bonding in butanol, it has higher boiling point than e

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